1 // Copyright 2016 The Go Authors. All rights reserved. 2 // Use of this source code is governed by a BSD-style 3 // license that can be found in the LICENSE file. 4 5 package main 6 7 // Test that SIGPROF received in C code does not crash the process 8 // looking for the C code's func pointer. 9 10 // The test fails when the function is the first C function. 11 // The exported functions are the first C functions, so we use that. 12 13 // extern void GoNop(); 14 import "C" 15 16 import ( 17 "bytes" 18 "fmt" 19 "runtime/pprof" 20 "time" 21 ) 22 23 func init() { 24 register("CgoCCodeSIGPROF", CgoCCodeSIGPROF) 25 } 26 27 //export GoNop 28 func GoNop() {} 29 30 func CgoCCodeSIGPROF() { 31 c := make(chan bool) 32 go func() { 33 <-c 34 start := time.Now() 35 for i := 0; i < 1e7; i++ { 36 if i%1000 == 0 { 37 if time.Since(start) > time.Second { 38 break 39 } 40 } 41 C.GoNop() 42 } 43 c <- true 44 }() 45 46 var buf bytes.Buffer 47 pprof.StartCPUProfile(&buf) 48 c <- true 49 <-c 50 pprof.StopCPUProfile() 51 52 fmt.Println("OK") 53 } 54
